Sir William Beecher (24 April 1628 – 5 December 1694) was an English politician who sat in the House of Commons from 1667 to 1679.
Beecher was the son of Oliver Beecher of Fotheringhay, Northamptonshire and Howbury, Bedfordshire and his wife Elizabeth Tate, daughter of Sir William Tate of Delapré Abbey, Northamptonshire.
In August 1660 he became Deputy Lieutenant and commissioner for assessment for Bedfordshire and in September 1660 a J.P. for Bedford.
He was one of those nominated to be Knight of the Royal Oak and had an estate worth £1,600 a year.
He married secondly on 24 December 1660, Elizabeth Hillersden, widow of Thomas Hillersden of Elstow, Bedfordshire and daughter of John Huxley of Edmonton, Middlesex.